Abstract

X-ray and ultraviolet photoemission of Co deposited onto aluminum tris(8-hydroxyquinoline) is investigated in situ. The initial Co deposited onto reacts to form a complex. After 1 nm of Co is deposited core level and valence band spectra show evidence for the formation of metallic cobalt. After 2 nm of Co is deposited onto x-ray magnetic circular dichroism spectra reveals the Co is ferromagnetic at 300 K. Transmission electron microscopy images show an abrupt interface between Co and with minimal intermixing. These results provide valuable insight into the electronic, magnetic, and physical structure of the interface.

Received 31 March 2009Accepted 11 May 2009Published online 09 June 2009

Acknowledgments:

The authors thank the National Science Foundation for support of this work through Award No. DMR-02–13985 (UA MRSEC). This work is also based on research conducted at the Synchrotron Radiation Center, University of Wisconsin-Madison, which is supported by the NSF under Award No. DMR-053758.

The authors thank Dr. S. Kang for assistance with the TEM measurements.

Abstract

X-ray and ultraviolet photoemission of Co deposited onto aluminum tris(8-hydroxyquinoline) is investigated in situ. The initial Co deposited onto reacts to form a complex. After 1 nm of Co is deposited core level and valence band spectra show evidence for the formation of metallic cobalt. After 2 nm of Co is deposited onto x-ray magnetic circular dichroism spectra reveals the Co is ferromagnetic at 300 K. Transmission electron microscopy images show an abrupt interface between Co and with minimal intermixing. These results provide valuable insight into the electronic, magnetic, and physical structure of the interface.